Optics B/C

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Re: Optics B/C

Postby MattChina » March 14th, 2018, 7:27 pm

Restarting this... Why do light waves undergo specular reflection when hitting a mirror but diffuse reflection when hitting a piece of paper?
Becuase the mirror is flat and the paper is not?
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Re: Optics B/C

Postby UTF-8 U+6211 U+662F » March 14th, 2018, 7:27 pm

Restarting this... Why do light waves undergo specular reflection when hitting a mirror but diffuse reflection when hitting a piece of paper?
Becuase the mirror is flat and the paper is not?
Sure. Your turn!

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Re: Optics B/C

Postby MattChina » March 14th, 2018, 7:33 pm

Image

A beam of light enters a transparent prism from the air and refracts as shown in the diagram to the right. Find angle Y.
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Re: Optics B/C

Postby UTF-8 U+6211 U+662F » March 14th, 2018, 7:54 pm

Image

A beam of light enters a transparent prism from the air and refracts as shown in the diagram to the right. Find angle Y.
sin 59 = 1.5 sin (90-x)
X = 90 - arcsin(sin 59 / 1.5)
Y = 120 - X = 65 deg

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Re: Optics B/C

Postby MattChina » March 15th, 2018, 3:18 pm

Image

A beam of light enters a transparent prism from the air and refracts as shown in the diagram to the right. Find angle Y.
sin 59 = 1.5 sin (90-x)
X = 90 - arcsin(sin 59 / 1.5)
Y = 120 - X = 65 deg
Correct. Your Turn.
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Re: Optics B/C

Postby UTF-8 U+6211 U+662F » March 15th, 2018, 4:15 pm

The ___ approximation is a small angle approximation used in __ optics (sorry, a little bit vague) and ray tracing.
First blank means hitting close to the optical axis
Second blank refers to a mathematician

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Re: Optics B/C

Postby Etan » March 23rd, 2018, 2:37 pm

Here's a question:

If person A is standing 11.25 ft away from a mirror, how far away will there image be?
How far away would person B's image be if they stood 28 ft behind person A?
If the mirror was a concave mirror what would happen to person B's image?
if the mirror was a convex mirror what would happen to person A's image?

I know that it's basically 4 questions and that it's pretty simple but hey, what are ya gonna do?
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Re: Optics B/C

Postby UTF-8 U+6211 U+662F » March 23rd, 2018, 5:02 pm

Here's a question:

If person A is standing 11.25 ft away from a mirror, how far away will there image be?
How far away would person B's image be if they stood 28 ft behind person A?
If the mirror was a concave mirror what would happen to person B's image?
if the mirror was a convex mirror what would happen to person A's image?

I know that it's basically 4 questions and that it's pretty simple but hey, what are ya gonna do?
1) 22.5 ft
2) 50.5 ft from A, 78.5 ft from B
3) If past one focal length, it would be inverted, real, and smaller. If within one focal length, it would be upright, virtual, and larger.
4) Upright, virtual, smaller

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Re: Optics B/C

Postby UTF-8 U+6211 U+662F » March 31st, 2018, 6:13 pm

Restarting...

Explain the joke in a license plate that says "If this appears blue, you are going too fast."

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Re: Optics B/C

Postby Adi1008 » April 3rd, 2018, 5:50 pm

Restarting...

Explain the joke in a license plate that says "If this appears blue, you are going too fast."
Doppler effect. When you're moving towards an object (or it's moving towards you) the wavelengths become shorter (appear bluer)
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